Two-scale modeling of DP steel incorporating distributed properties inside micro-constituents
J. Schröder, A. Gandhi, D. Balzani.
Procedia Engineering, 81, 1390-1395, (2014)
Advanced High Strength Steels (AHSS) are increasingly used in the industry due to their excellent strength and formability properties enabling weight savings. In this wide class of steel we restrict ourselves to the modeling of Dual Phase (DP) steels which are, at the microscale, characterized by a hard martensitic inclusion phase embedded in a soft ferritic matrix phase. During the production process the martensite transforms from austenite by rapidly cooling down the material and thereby causing a volume jump leading to initial plastic strains associated with eigenstresses of higher order. A technique to incorporate theses distributed properties in the ferrite matrix is proposed and implemented using the direct micro-macro transition approach. © 2014 The Authors. Published by Elsevier Ltd.
Keyword(s): FE2 scheme, DP steels, thermomechanics, residual stresses, microstructure, finite plasticity
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